Document naZomb9Q34XvYodYE2zv3Q1a

State of New York . DEPARTMENT OF STATE IT IS HEREBY CERTIFIED, that the attached Is a true copy of 12 NYCRR, Part 12 as filed with the New York State Department of State on January 18, 1971 DOS-235 (Rev. 7/89) Secretary of State CHAPTER X BOARD OF STANDARDS AND APPEALS 12.1.3 PART 12 CONTROL OF AIR CONTAMINANTS (Statutory authority: Labor Law || 27-a, 38, 29, 200, 299) Historical Noto Part (it 12.1-12.29) amd. filed Jan. 12, 1971 aff. May 1.1971. Nnr Part snUtituUd. Subpart 12-1 General Requirement* Subpart 12-2 Specific Operations and Specific Control Requirements Subpart 12-2 Evidence of Dangerous Air Contaminants SUBPART 12-1 GENERAL REQUIREMENTS 13-14 13-1.2 13-14 13-1.4 13-1.5 12-14 Findings at tset Application Definitions Prevention of sir contamination Personal protective equipment General oontrol requirements 13-l.T Prevention of Ignition 12- 14 Operations using flammable liquids 13- 1.9 Entering confined spaces 12- 1.10 Maintenance and operation of qulpzntat 13- 1.11 Approved devices or materials 12-143 Severability Section 12-1.1 Hading of tact The board finds that every Industry, trade, occupation and process Involving the use or presence of materials that produce air contaminants may bo hazardous to the lives, health and safety of the persons employed therein. Hie board, therefore, finds that special regulations are necessary for the protection of such persons. 12-1.2 Application, (a) This Part (rule) applies to any industry, trade, occu pation, process or place in the State of New York where air contaminant! are gen erated, which is the subject of any of the provisions of the Labor Law pertaining to the protection of the lives, health and safety of employees or the public,- except as otherwise provided by law, including but not limited to: factories; mercantile estab lishments; places of public assembly; amusement devices at carnivals, fairs and amusement parks; buildings, structures or areas where construction, excavation or demolition work Is being performed; coin-operated machines performing a manufac turing process; ski tows and other passenger tramways; vehicular bridges and tun nels operated by bridge and tunnel authorities subject to the Public Authorities Law; but excluding any occupation or process performed on a farm aa defined In this Part (rule). (b) Specific provisions relating to the prevention and control of air contaminants cited in other industrial Code Parts (rules) either existing or adopted in the future shall take precedence over this Part (rula), where such provisions are inconsistent with this Part (rule). (c) The provisions of Industrial Code Part (Rule No.) 18 relating to exhaust systems shall apply to operations not specifically covered by other Industrial Code Parts (rules). 12-1.3 Definitions. Aa used herein and in connection with this Part (rule) the following terms mean: (a) Air contaminants. Airborne substances, such aa dust, fibers, fumes, gases, mists, vapors and other impurities. This Part to taka effect May 1, 1371. For presently effective provisions see pp. 1STISA 1864 IS 1-81-71 S 12-14 TITLE 12 LABOB (b) Air mover. Any device which produce* forced sir flow, such ss a fan, ejector or natural draft stack. (c) Approved. Is respect to a device or material: in compliance with a sub sisting resolution of approval adopted by the board; in respect to action by the board: made the subject of a resolution of approval. (d) Board. The Board of Standards and Appeals of the State of Mew York. (e) Commissioner. The Industrial Commissioner of the State of Mew York. (f) Confined apace. A tank, vault or similar enclosed structure or space with restricted means of egress, such as a manhole or trap door, which is so enclosed and of such volume that natural ventilation through openings provided will not prevent the accumulation of dangerous air contaminants nor supply sufficient oxygen to protect the life, health and safety of any person occupying such structure or space. (g) Control equipment. Equipment used to prevent air contamination or reduce or remove air contaminants. (h) Dangerous air contaminanta. Air contaminants in concentrations tending to injure the health of persons. Air contaminanta in quantities greater than 25 percent of the lower explosive level of any substance, mixture or compound which they may form. (I) Dilution ventilation. A ventilation system other than local ventilation which reduces air contamination to safe levels by the Introduction of uncontaminated air. (J) Dipping. The application of industrial products coating material by means of total or partial immersion. (k) Employee. A person employed; one who works for wages or salary in the service of another. (l) Exhaust system. A ventilating system operating under negative pressure for the control of air contaminants. (m) Farm. A tract or parcel of land and the buildings and structures thereon used for husbandry and the production and storage of agricultural and horticultural commodities Including but not limited to the following: livestock; dairy; poultry; fur-bearing animals; fruit and truck farms; orchards; plantations; apiaries; and nurseries. (n) Fibers. Particles produced by handling, cutting, stripping, spinning or weav ing of cotton, wool, fur, asbestos or other material constituted of thread-like or slender elements. (o) Flammable solid. Any solid which will ignite and continue to bum whan brought in contact with an open flame, glowing combustion or other source of ignition. (p) Flammable liquid. Any liquid having a flash point of 100 degrees Fahrenheit or less as determined by the Tagliabue closed-cup test (q) Flammable gas or vapor. A gas or vapor, or mixture of gases or vapors, whose concentration is in excess of 25 percent of the lower explosive level. (r) Impregnating. The application of liquid material by permeation or satura tion. (s) Industrial products coating. The application of paint and finishing material by dipping, impregnating, spraying or spreading, including operations inci dental to such work and subsequent drying operations, where the finishing mstsrisi contains flammable or toxic solvents or materials. (t) Local exhaust ventilation. A system for ventilation for crfiwetfag and re moving air contaminants at the source of generation. 2MA LB 1-81-71 .(u) Mechanloai ventilation. A system of ventilation having' a power-driven air now. () Open surface tank operation. An operation which involves the use of a tank containing liquid with the liquid surface directly exposed to the work atmosphere. Such operations may include hut are not limited to washing, electroplating, anodiz ing, pickling, quenching, dyeing, dipping, tanning, dressing, bleaching, degreasing, alkaline cleaning, stripping, rinsing, digesting and other similar operations, (w) Personal respiratory protective equipment A respirator or other device worn for the purpose of preventing the wearer from inhaling harmful amounts of air (x) Practicable. Capable of being done without disturbing essential functions or essential structural elements. (y) Recirculation. The return of part or all of the exhaust air to any space occupied by employees. (a) Shall The word "shaH" is always mandatory. (aa) Spraying. The application of any liquid material in the form of a mist. (bb) Spreading. The application of any liquid material to a surface by brush, roller, flow or similar method. (cc) Sufficient oxygen. A minimum of 20 percent oxygen by volume at Standard Temperature and Pressure conditions (S.T.P.), 70 degrees Fahrenheit and 14.7 pstn. (dd) Tumbling process. Any process in which articles, pieces or parts are placed in a rotating barrel, drum, mill or cage for the purpose of removal of rust, scale, debris or dust as well as for tbs purpose of smoothing, polishing, burnishing or cleaning by means of agitation. (ee) Work atmosphere. The atmosphere to which an employee is exposed in the course' of performing his work. (ff) Working area or space. The area or space normally occupied or traversed by an employee while at work. 12-1,4 Prevention of air contamination, (a) General. All operations or proc esses which produce air contaminants shall be so conducted that the generation, release or dissemination of such air contaminants is kept at the lowest practicable level in compliance with this Part (rule) using proper control or protective proce dures and equipment All equipment used to effect compliance with this Part (rule) shall be maintained in good condition and in accordance with the requirements of the Labor Law and of the Industrial Code. (b) Responsibility of employers. (1) Evsry employer shell effect compliance with the provisions of this Part (rule) relating to the prevention and removal of air contaminants, the storage and use of flammable liquids and the provision, installation, operation and maintenance of control or protective equipment (2) Every employer shall instruct his employees aa to the hazards of their work, the use of the control or protective equipment and their responsibility for complying with the provisions of this Part (rule). (8) No employer shall suffer or permit an employee to work in a room in which there exist dangerous air contaminants in a work atmosphere. (4) No employer shall suffer or permit dangerous air contaminants to accu mulate or remain in any place or area subject to the provisions of this Part (rule). (o) Responsibility of employees. Every employee shall use the control and pro tective equipment provided for his protection and shall comply with all provisions of this Fart (rule) relating to bis personal conduct 18&8 IS 1-81-71 | 12-1J TITLE 13 LABOR 12-1 >5 FeroaI protective equipment. (a) Personal respiratory protective equipment. (1) Use. Personal respiratory protective equipment shall not be used in lieu of other control methods, except tor protection of employees in emergencies and in the repair, maintenance or adjustment of equipment or processes, or upon specific approval by the board. (2) Approval Personal respiratory protective equipment shall be of a type approved by the board for the particular class of substance or substances consti tuting the air contaminant. - Beit: A list of approved respiratory protective equipment may be secured from the board. (8) Maintenance, Personal respiratory protective equipment shall be stored in air-tight containers or cabinets or in an uncontaminated area. Such equipment shall be cleaned, serviced and repaired to maintain it in effective working condi tion and it shall be sterilized before use by any person other than the last wearer. ( r (b) Gaggle*, masks and shields. All employees exposed to air contaminants tending to injure or irritate the eyes shall be provided with and shall wear either safety goggles, close-fitting chemical goggles or an effective face mask or shield. An employee requiring prescription lenses in the normal performance of his work shall be supplied with prescription goggles or with goggles designed to fit over his regular spectacles. (c) Protective clothing. All employees exposed to air contaminants which tend to cause skin irritation or skin diseases, or which can be absorbed through the skin in amounts tending to injure the health, shall be provided with appropriate dean, protective clothing, such as coveralls, coats, headgear, gloves, sleeves or aprons as needed or where suitable. (d) ' Emergency flushing facilities. Emergency showers or other facilities for flushing the skin and body members shall be provided within 50 feet of the working position where employees may be exposed to sudden and severe concentrations of corrosive air contaminants. 12-1.6 General control requirements, (a) General control methods. One or more of the following methods shall be used to prevent, remove or control dangerous air contaminants: (1) Substitution of a material or a method which does not produce dangerous air contaminants. (2) Local exhaust ventilation conforming to the requirements of Industrial Code Part (Rule No.) 18. (8) Dilution ventilation. (4) Application of water or other wetting agent (5) Enclosure or isolation. (6) Other methods approved by the board. (b) Exhaust systems. Every exhaust system required by this Part (rule) shall be constructed, installed, operated and maintained in compliance with the provisions of Industrial Code Part (Rule No.) 18 relating to exhaust systems. Bote: The discharge of effluents from sources of sir contamina tion to the outer sir shall be made in accordance with article 12-a of the Public Health Law, with the Environ mental Conservation Law and with any rules or regula tions promulgated thereunder. (c) Isolation or segregation of operations. AH processes or operations releasing or disseminating dangerous air contaminants shall be isolated, enclosed or otherwise segregated Insofar sa practicable. ( V 188.4 IS 1-81-71 CHAPTER Z BoS^RD^CF skfcNBAtfbS ANlTXrrEXLS S 12*1.8 (d) Separation of different processes creating a haxard. Where processes gen erate different air contaminants which could, if intermixed, result in a Are or explo sion hazard, such contaminants shall be exhausted by separate systems so as to eliminate such possibility. 12*1.7 Prevention of ignition, (a) AS processes or operations using or gen erating air contaminants which constitute a fire or explosion hazard shall be pro tected from sources of accidental Ignition. Unless such processes or operations are isolated by tight partitions or enclosures they shall not be conducted within 20 feet of any materials, devices or operations which produce flames or sparks including, by way of illustration but not by way of limitation, engines, motors, welding and soldering torches. AH processes and operations within 20 feet of any spark or flame producing work such as welding shall be discontinued and all lgnitlble air contami nants, flammable liquids and accumulated flammable residue shall be removed from the area of the flame or spark hazard before such work is begun. (b) Concentrations of vapors which may be present in enclosed anas shall be deemed to be flammable when any such concentration exceeds 25 percent of the lower explosive level. 12*1.8 Operations using flammable Squids, (a) Use of flammable liquids. (1) U*e of oertatn flammable liquids. The use of flammable liquids for paint removal, cleaning or any other process in which they are unprotected and exposed shall be restricted to areas provided with mechanical ventilation creating an air movement of at least 100 feet per minute over the surface of the work while the work is being carried on. The use of benzene for such operations is prohibited. Any solvent used shall contain not more than 8 percent benzene as an impurity. , Flammable liquids shall not be used to dean walls, ceilings or floors In a workroom. (2) Transfer of flammable liquids. The transfer of flammable ahaH be by means of a hose or pipe leading to the bottom of the vessel being filled, except for the filling of approved safety cans. When transferring such liquids from one metal container to any other metal container, the two containers shall-be bonded together electrically and be properly grounded. Exception: This paragraph does not apply to the filling of motor vehicle ana industrial equipment fuel T|V- (8) Mixing and thinning of flammable liquids. The mixing and thinning indoors of flammable liquids In unit quantities greater than 55 gallons ehaii be done only in a mixing or spraying zoom and in such manner and under such ventilation as will effect compliance with this Part (rule). Lesser quantities shall be mixed or thinned indoors only in such a roost or within a hood, booth or working area provided with ventilation as specified in section 18.20 of Industrial Code Part (Rule No.) 18. Exception: Quantities of five gallons or less may be *"*<< er thinned when natural ventilation will reduce toe vapor concentrations to the limits as specified fit Table X of this Fart (rule) within five minutes. (4) Coating removed by use of solvent*. Such a process shall be provided with adequate exhaust ventilation while the removal of residue, paint or other material is being performed. The rate of ventilation shall be that specified in Industrial Coda Part (Rule No.) IS. Note.* The use of bensene or carbon tetrachloride for snoh an e*> oration is prohibited. (6) Cleaning solvents. Flammable liquids used for cleaning permanent sur faces other than floors in a working space ahaH have a flash point above 100 1888 ZB 1-M.-71 S 12-14 TITUS 12 LABOR degrees Fahrenheit The use of benzene for this operation Is prohibited. No dun* mable liquids shall be used to clean floors. (6) Tank*, trough* and mechanical application. (i) Enclosed operation*. Enclosed operations involving the use of flam* xnable liquids and any subsequent drying operations shall be mechanically ventilated to maintain the concentration of vapors within the enclosures below 25 percent of the lower explosive level. Necessary work openings of such enclosures Shall have inward air flows maintained by mechanical ventilation. As an alternative method, enclosed processes may be operated in an inert at* mosphere. Where an inert atmosphere is used for an enclosed operation, ade quate provision shall be made to insure that sufficient oxygen is available in the areas surrounding such enclosed operation. Any escape of the inert atmos phere to areas outside the enclosure shall not and create danger ous air contaminants. (ii) Fire protection. Tanks and troughs containing flammable liquids Shall be provided with heat-actuated automatically closing covers arranged so as not to interfere with exhaust ventilation. Where operations in such tanks and troughs are performed automatically the tanks and troughs shall be provided with approved Are extinguishing systems. Noto: Tot additional requirements concerning Are protection see paragraph 12*1.8(c)(1) of this Fart (rule). (ill) InataBation of tank*. Tanks Shall be arranged to prevent accidental tipping. (iv) Seating of liquid*. Devices used for heating flammahle liquids shall be provided with an automatic temperature regulation device to arranged that the,source of heat shall be automatically shut off when the temperature of the liquid rises above the normal operating temperature. (b) Storage of flammable liquid*. (1) Enclosure of atorage room*. The floor surfaces of rooms used for the atorage of flammable liquids shall be of incom bustible material and shall be waterproof. The room enclosure shall be of con struction having the following miwirmnw fire-resistive rating: Walls .............................................................................. l hour Doors ........................ % hour Windows ....................................... % hour Ceiling (if apses above is occupied)...................... 1 hour Sloop .................................... 1 hour Kate: For requirements concerning fire-resistive construction see Industrial Code Part (Rule No.) 7. (2) location of atorage rooms. Storage rooms for flammable liquids Shall be located at or above grade and an exterior wall of the building shall form at least one wall of .the room. No opening in any storage room shall be located within 16 feet of any stairway, elevator shaft or building exit (8) Floor drainage and door *&*. (1) Floors of storage rooms containing flammable liquids shall be con structed so as to confine any spillage of flammable liquids. Solid floors shall be pitched at least one inch in 86 inches from the walls and entrances toward a drain which shall be provided to direct the liquid to a safe location outside the plant such as a sump, tank or similar collecting basin. Every drain shall be equipped with a trap which shall be kept full of a suitable liquid and so maintained as to prevent back flow of flammable vapors. The drainage system from any room used for the storage of flammable liquids shall be isolated from the plant drainage system. 186.6 LB 1-KU7X CHAPTER I BOAaDK)F'SI^DAWJ^~CtB-JLEEEAi^ 112-1J (II) 801a or ramp* of incombustible material at least three Inches in height sbn be provided at every door leading to a storage room. Alternatively, six inch deep by six Inch wide gutters covered with substantial open gratings and leading to drains h<*n be provided at such passageways. Such gutters shall extend across the full width of the openings within the storage rooms. (4) Limitation of quantities. No more than one day's supply or 220 gallons of flammable liquid, whichever is less, shall be kept In a workroom. Such supply, unless kept in closed drums or in original sealed containers not to exceed live gallons capacity, or in approved safety cans, shall be kept in cabinets as follows: (1) Cabinets for storing quantities of flammable liquid not exceeding 110 gallons shall be of at least incombustible single wall construction and shall be vented to the outer air. (il) Cabinets for storing quantities of flammable liquid of more than 110 gallons but less than 220 gallons be of incombustible double wan con* struction with an air space of at least one and one-half inches or metalcovered wood construction throughout and shall be vented to the outer air at top and bottom. (III) Quantities exceeding 220 gallons than be kept bn a storage room a* specified In paragraphs (1) through (8) of this subdivision. Door* to storage cabinets shall be kept closed and latched. (S) Container*. Containers used for flammable or toxic liquids, whether or not they contain such material, shall be kept tightly covered when not in use or when being moved about with the exception of safety cans of any size and glass or plastic containers which are one quart or leas in size (volume). (c) Other equipment requirements. (1) Jftre protection equipment (1) Automatic sprinklers. Automatic sprinkler systems with sufficient heads or outlets shall be provided In all working areas of buildings two stories or more In height where flammable liquids are used or stored. Noto: Tor sprinkler system requlremsnts see Industrial Code Part (Rule No.) 20. (ii) Automatic extinguisher*. Dip tanks, drain boards, drip pans and drip troughs involving tha use of flammable liquids shall be provided with approved automatic Are extinguishers except for tha following: (a) Those used in electrostatic finishing. (b) Band dipping tanka which with their associated drain boards, drip pans and drip troughs have a vapor surfaca area not greater than 16 square feet (ill) Bond exthtffvlehers. There shall be provided adjacent to the inside or outside at each required exit from the room in which flammable liquids are being used or stored at least one hand firs extinguisher approved for the control of flammable liquid fires. Extinguishers containing carbon tetrachlor ide, methyl bromide or other toxic material are prohibited for this usage. In addition, there shall be at least one approved extinguisher for each 2500 square feet of floor area so located that a person shall not have to travel more than 80 feet to reach the nearest extinguisher. Extinguishers b* easily acces sible and protected from damage. (3) Slectricdt equipment (1) Wiring and equipment. All electric wiring and electrical equipment shall be of good quality and be properly installed. Wiring within 10 feet of a working area or within a storage room be Installed In sealed rigid metal conduit with explosion-proof fittings. Meeeption: Operations not involving flammable solvents. 186.7 LB 1-81-71 12-14 TITLE! 13 LABOR (U) Lighting. Artificial lighting ahall be by electricity. Lamps within areas where flammable liquids may be used or stored or where flammable vapors may be present shall be of the totally enclosed type and shall be pro* tected against breakage either by location or by lamp guards. Lamp sockets ahall be non-metallic shells and of the switchless type. (ill) Control equipment Switches and other control devices, unless explo sion-proof, shall be located at least 10 feet from the working area and outside of storage rooms. (tv) Flexible electrical corde and portable Ughts. Flexible electrical cords used in any area where flammable liquids are being used or stored or where flammable air contaminants may be present shall be of the three conductor, extra-heavy service type manufactured for the purpose and shall be fully . insulated and grounded. AH connections shall be explosion-proof. Portable lights used in such areas shall be shielded against breakage. (v) Other equipment (a) AQ electrical equipment located in a storage room or the interior of coating hoods or their exhaust ducts shall be explo sion-proof. Mooeption: Air merer motors Installed in compliance with sub division (d>, section l&tt of Industrial Code Past (Rule No.) li (b) Systems designed to salvage desposlts by collecting them in flam mable solvent shall have the controls so arranged that the solvent pump cannot operate unless the ventilating fan is operating. (vl) Grounding of equipment. AH mechanical equipment used for the ap plication of flammable liquids and all booths, hoods, tanks, troughs, conveyors, fans, motor housings and an belts within a working area ahall be grounded. (8) Seating. Units used for comfort heating of any space to which this Part (rule) applies in which flammable liquids are used, handled or stored ahall be con fined to the use of low-pressure steam or hot water or indirect forced warm air. Direct warm air heating systems may be used subject to approval by the board. Heating units shall be kept free of deposits of flammable compounds. (4) Ventilation. Rooms used for the storage of flammable liquids shall be provided with a minimum rate of ventilation of five cubic feet per minute per square foot of gross floor area and the ventilation shall be maintained during transfer of flammable liquids from one container to another. Where mixing and thinning operations are performed, the rate of ventilation shaU conform to the requirements at section 18.20 of Industrial Code Part (Rule No.) 18. (8) Protection of adjacent occupancies. (1) WdU or ceding construction. No employer shall suffer or permit flammable liquids to be used or dispensed in any room above or below or adjoining one in which there is an employee occupancy unless: (a) the room Is part of a building which is a fireproof building or a fire-resisting building complying with the provisions of Industrial Code Part .(Bui* No.) 7, or (b) the walls and of the room within 20 feet horizontally of the working area are so constructed as to have a fire-resistance rating of at least one hour in accordance with Industrial Code Part (Rule No.) 7 and, if there be an employee occupancy below such room, the floor of the room within such distance is of incombustible material and is waterproof, or (o) such room is equipped with automatic sprinkler protection conform ing to the provisions of Industrial Cods Fart (Rule No.) 20. (11) WdU openings. Wall openings In every room In which flammable 1864 LB 1-81-n CHAPTER I BOA^P QF^AN^^T9 I f2>1.9 liquids are used, handled or stored shall be provided with approved three-quarter hour self-closing fire doors or with approved three-quarter hour fire windows. No such room shall have any window openings beneath or within 10 feet horiI sontally of any fire escape or required exterior stairway. 12*1.9 Entering confined spaces, (a) General (1) Confined spaces where dangerous air contaminants have been present are present or could be Introduced from potential sources shall not be entered by any person for any reason until the atmosphere of such confined spaces has been tested ( and found free of dangerous air contaminants. Any such confined space shall be continuously maintained free of dangerous air contaminants during any period of occupancy. If, however, due to emergency conditions any such confined space cannot he cleared of dangerous air contaminants by mechanical ventilation or equivalent means, any person entering such confined space shell be provided with and shah use an approved air line respirator, approved hose mask or approved self-contained breathing apparatus. (2) Whenever a confined space is to he entered, a person who has been desig nated as a safety monitor shah function as required by this Part (rule). A confined pace shahnot he entered unless there is at least one other person in addition to the required safety monitor ready to render assistance in an emergency when alerted. Such additional person shah be located within 100 feet unobstructed walk ing distance from and not more than one floor above or one floor below the access opening of such confined space. The assigned duties of such additional person shah be such that they Will not prevent him from responding immediately to an emer gency when alerted. (b) Preparation for entering a confined tpace. prior to entering any confined space following steps shall be taken to Insure the safety of the person entering: (1) Any contents shah be removed, emptied or drained from the confined space Insofar as is possible and the interior shah be purged by water or other equivalent means. (2) Ihs person entering the confined space or a designated qualified person shah lock out the circuit breakers or switches of ah electrically operated equipment such as agitator drives, pumps and similar equipment which is connected to or affects the confined space and could affect the health and safety of any person in the confined space. The keys for such locks shah be retained by the person entering the confined space. (8) Ah manhole and dean-out covers shah be removed end the openings main tained dear of any obstructions. (4) Ah input lines which discharge into the confined space shah be discon nected and capped or provided with line blank flanges. The use of a single in-line valve shut-off is prohibited as the sole means of isolating the confined space from any input Una. However, the use of a double in-line valving arrangement with a vent in between the two valves is acceptable provided that dangerous air contam inants are not created by such venting. (8) Tests in the confined space for the presence of dangerous air contaminants or lack of sufficient oxygen, or both, where the threat of each condition exists shall be made by a designated person who is qualified to conduct such tests by training and experience. Such tests shah he performed using calibrated equipment of a type suitable for the air contaminants involved. If such tests indicate that air contam inants in excess of the concentrations listed In subpart 12-3 of this Fart (rule) are present in the confined space, the space bn be purged by mechanical ventilation until a subsequent test indicates that the air contaminant concentration is in com pliance with subpart 12*8 of this Fart (rule). If more than one type of air contain- 18&2 LB 1-81-71 t ** li'i'UtL U LABOR tout la known to be present or could be Introduced in the confined space, additional tests shall be made for each contaminant A confined space containing air con* taminants which may develop an explosion hazard shall be purged by mechanical ventilation until tests indicate that the concentration of air contaminants in the confined space is not more than 25 percent of the lower explosive level of such air contaminants and that there is sufficient oxygen available in the confined space. Xn lieu of purging by mechanical ventilation, an inert atmosphere may be main* talned in the confined space, provided that control devices are used to insure that * combustion or ignition of material, including gases, cannot occur. Whenever an inert atmosphere is maintained in a confined space, every occupant shall be equipped with an approved self-contained breathing apparatus, an approved air line respirator or an approved hose mask. Every occupant shall leave the confined space immediately in the event of an interruption of the air supply to the breathing apparatus. The inert atmosphere shall be prevented from contaminating all other work areas, including the area of the access opening to the confined space and adjacent areas. Maintenance' of the inert atmosphere shall in no way interfere with or prevent the emergency escape of an occupant from such a confined space. (6) The mechanical ventilation system shall be so designed that the contam inants or contaminated air is transported to some safe location, without recircula tion, and the replacement entry air does not contain dangerous air contaminants, but does contain sufficient oxygen. The provisions of this paragraph shall also apply to the exhausting of an inert atmosphere. (7) Any person entering a confined space shall be provided with and *h*n use the following additional safety equipment: (i) Where the least dimension of any access opening to a confined space is less than 24 inches, approved wrist straps or approved noose-type wristlets shall be worn. Where the least dimension of such access opening is greater than 24 inches, either an approved life belt, approved safety harness, approved wrist straps or approved noose-type wristlets shall be worn. (il) A lifeline, as specified by the provisions of Industrial Code Part (Rule No.) 23, shall be attached to such life belt, approved safety harness, approved wrist straps or approved noose-type wristlets with the other end securely anchored outside the confined space. Exception: Where rach a lifeline attached to approved wrist straps or approved noose-type wristlets Interferes with the performance of the work duties of the person occupying the confined space, such lifeline complete with safety snaps may be disconnected from the wrist straps or wristlets provided the lifeline safety snap remains within three feet of the person in the confined apace for quick attachment to the wrist straps or wristlet*. (ill) A safe means of ingress and egress, such as a portable ladder, pro vided such means will not obstruct the access opening. (tv) An explosion-proof battery-operated portable light in good working order. (v) Non-sp&rldng striking, chipping, hammering or cutting tools and equipment where the confined space may contain explosive or flammable air contaminants. (e) Safety monitors. (1) A person designated as a safety monitor shall be stationed at the access opening of any confined space while such space is occupied for any reason. The safety monitor shall maintain visual contact with every occu pant in the confined space where the construction of the confined space permits, or shall have continuous knowledge of the activities and well-being of every occu pant of the confined space via verbal communication or other positive means at 138.10 LB 1-31-71 1 aUAJUL) telAlVU, A-AUJ AWtiAU* 12*1.10 all times. Such safety monitor may assist an occupant of a confined space in such light duties as handling tools or supplies or removing containers of refuse or debris provided that these tasks do not interfere with his primary duty as a safety monitor. (2) The safety monitor shn be an alert, competent person, fully capable of quickly summoning the assistance of a person or rescue team for the administra tion of emergency first aid treatment if required. (3) The safety monitor must be physically able to assist such summoned person or rescue team in the extrication of an occupant from a confined space under emergency conditions. (4) Ths following emergency equipment Shall be available to the safety moni tor or rescue personnel for use if required. (!) Approved air line respirator, approved hose mask or approved selfcontained breathing apparatus. (ii) Explosion-proof battery-operated portable light in good working order. (iii) Safety equipment as specified in subpart 12-1, section 12-1.9, sub division (b), paragraph (7), subparagraphs (1) and (il) of this Part (rule). (5) Such emergency equipment shall be located at the access opening of ths confined space or not more than 15 feet from such opening. (d) Operation* requiring continuout testing. If the nature of the work to be performed produces or has the potential to produce dangerous air contaminants as specified in this Part (rule), continuous testing shall be performed. If such tests indicate evidence of dangerous air contaminants exceeding the concentrations listed in subpart 12-3 of this Part (rule) or in quantities greater than 25 percent of the lower explosive level, the occupants shall be ordered to evacuate the confined space immediately. (e) External alarm signal. Outside of every occupied confined space there shall be an audible alarm signal device located within 15 feet of the access opening. Such device may be of the portable type and shall be maintained in good working order. When actuated, such audible alarm shall be louder than the general background noise level and should be capable of being heard clearly by any person located within 100 feet of the access opening. In case of an emergency in a confined space, the safety monitor shall immediately actuate the alarm signal. In no case shall the safety monitor or other rescue personnel enter the confined space without first actuating the alarm signal and, secondly, putting on his personal protective equipment (f) Illumination. There shall be installed and maintained an independent sub stitute emergency lighting system in addition to the principal lighting system in any area where a confined space is located and which is entered frequently for cleaning and maintenance purposes. Such substitute emergency lighting system shall operate automatically upon failure of the principal system and shall be capable of providing distinct illumination for a period of at least 30 minutes of all access openings of confined'spaces as well as of the general surrounding area and exits. Whenever the principal lighting system fails, the confined spaces shall be evacuated immediately. Where any confined space is to be entered infrequently for Inspection or similar pur poses, sufficient quantities of battery-powered lights in good working order shall be provided to afford distinct illumination at every access opening and its surrounding area and exit These lights shall be capable of providing illumination for a period at time of at least one hour. 12*1.10 Maintenance and operation of equipment (a) Equipment mainte nance. All equipment required by this Part (rule) shall be maintained in good repair and proper operating condition. 1S6.11 LB 1-31*71 12-1.11 TITLE 12 LABOR (b) Floor maintenance. The floor within and in the immediate vicinity of the working area shall be kept clean and clear of any waste material or any obstruction. Where dust may be created by dry sweeping, floors shall be wet down with a non* flammable wetting agent before sweeping. (c) Passage space. A minimum passage space of three feet shall be provided for access to every working station. (d) Purging. Exhaust systems shall continue in operation for a sufficient period of time after conclusion of operations to clear the air of dangerous air contaminants. (a) Containers. (1) All tanks and containers used for flammable liquids shall be of incombustible material and shall be kept closed whether full or empty, except as may be necessary for operational purposes. (2) Emptied drums or other containers shall not be stored indoors unless they have been purged of all contents constituting or creating dangerous air contain* inants. Purging shall be done in a mechanically ventilated area if performed indoors. Compressed air shall not be used for purging containers. (f) Refuse material Xn the vicinity of every process or operation to which this Part (rule) applies there shall be provided metal containers with self-closing covers and bearing the notice "FLAMMABLE WASTE". Such containers shall be used for scrapings, sweepings and other waste containing or consisting of flammable material. Such refuse shall be disposed of at the end of each day by burying, burning or other safe treatment but no such refuse shall be burned in a furnace. 12-1.11 Approved devices or materials. Any device or material which the board has approved pursuant to section 27*a of the Labor Law for use in complying with this Part (rule) may be so used as if by this Part (rule) specifically authorized, any general or special provision of this Put (rule) notwithstanding. 12-1.12 Severability. If any provision of this Part (rule) or the application thereof to any person or circumstances is held invalid, such invalidity shall not affect other provisions or applications of this Part (rule) which can be given effect without the invalid provision or application and to this end the provisions of this Part (rule) are declared to be severable. 12A32 LB 1-81-71 CHAPTER I BOARD 'BF tyPAJtpjQRQS AND S 12-2.4 SUBPART 12-2 SPECIFIC OPERATIONS AND SPECIFIC CONTROL REQUIREMENTS 8e. 13-31 Catting, grinding and polishing 2341 12-2.1 12-2.4 12-3.5 13-Ad Woodworking machines Melting apparatus Open surface tank operations Tumbling proceeaes Abrasive blitting operations Sea. 12-A7 Cruehing, milling, ecreenlng, nixing and conveying 13-3J Welding, brazing, flame cutting and metallizing 33-Ad Exhaust gases from motor Tahlelee operating in enclosed areas 13-A10 Industrial products coating 12-2,1 Catting, grinding and polishing wheels. Grinding, polishing, huffing, cratch brushing, abrasive cutting-off wheel and grinding or polishing belt strap operations generating dangerous air contaminants shall be provided with local ex haust ventilation and air cleaning devices. Meeeptlona: A Wet grinding with other than sandstone wheels and wet polishing and huffing operations if enclo sures are provided which prevent splash or disper sion of liquids, abrasive compounds or mists Into the workroom. A Intricate and precision grinding discs or wheels not over one inch in diameter. A Grinding or polishing of articles and Instruments made of gold or platinum. A Intermittent tool grinding operations used for shop purposes only. 12-2-2 Woodworking machines. Woodworking operations generating dangerous air contaminants shall be provided with local exhaust ventilation and air cleaning devices. 12-2.3 Melting apparatus. Vessels operated at or in excess of the temperature of volatilization of toxic metals, alloys or compounds which generate dangerous air contaminants shall be provided with local exhaust ventilation. Vessels used for melt ing or cleaning such metals, alloys or compounds shall be provided with exhaust ventilation when operated in such a manner as to generate dangerous sir contam inants. The combustion chamber, when operated in such s manner as to release dangerous sir contaminants, shall be provided with local exhaust ventilation. Eeoeptios; Portable receptacles or apparatus which have no fixed location and are used intermittently and which pro4b(h so dopyirani Air ******<<"** 12-2.4 Open surface tank operations, (a) General. Open surface tank op erations creating dangerous air contaminants shall be provided with ventilation to control such contaminants. (See Industrial Code Fart [Rule No.] 18.) (b) Classes of operations. Open surface tank operations are Classified Into groups In accordance with both hazard potential sad rate of contaminant release as set forth In section 18.14 of industrial Coda Part (Rule No.) 18. (c) Humidify control When heat Is added to the workroom to prevent the condensation of water vapor evaporated from open tanks into mist, such additional heat shall he so controlled that it does not raise the wet bulb temperature In the lower six feat of the workroom above 80 degrees Fahrenheit. (d) Olean-out doors. Tanks or machines used for cleaning by solvents and hav ing a surface vapor area of more than two square feet shall be equipped with suitable dean-out or sludge doors located near the bottom of each tank or still Such doors shall be constructed and maintained so that there Is no leakage of solvent when closed. (e) Solvent transfer. (1) Transfer of flammable solvents from containers shall be by means of a hose or pipe leading to the bottom of the tank being filled. Con- X8A18 LB 1-81*71 S 12-2.4 TITLE 12 LABOR tainers between which the transfer is being wide ><n be electrically bonded and grounded with a resistance of less than 25 ohms. (2) Volatile solvents shall not be stored or transferred in uncovered vessels. (f) Vapor phase degreasing. (1) Freeboard. The level of the vapors shall be kept below the top edge of the tank by a distance equal to at least one-half the tank width or 86 inches, whichever is less. (3) Beating, (i) Qae. Where gas is used as fuel for heating, the combus tion chamber shall be of tight construction, except for necessary combustion and due openings. Mechanically ventilated dues shall be independent of the exhaust duct Natural draft dues shsll be provided with draft diverters. AH dues shall be constructed of corrosion-resistant material. (11) Electric. Electric heating units shall be constructed of materials re sistant to the tank contents and shall be constructed and installed so as to prevent hot spots. (8) Thermostatic control. Every tank shall be provided with two thermo stats, one of which shall be connected to control or shut off the source of heat when the contents reach a temperature not higher than 20 degrees Fahrenheit in excess of the boiling point of the solvent in its uncontaminated state and the other of which shall be located above the vapor zone and be adjusted to shut off the source of heat when the temperature in the zone of the thermostat is at the boiling point of the solvent . (4) Condensers. Tanks shall be equipped with condensing or cooling surfaces consisting of pipes, coils, water jackets or any combination thereof located on at least two sides in the upper portion of the tank above the solvent liquid level. Water,- refrigerant or other cooling media shall be circulated through the mitwni1 whenever the tank is in operation. (g) Operation. (1) Where tanks are provided with loading hoists, the hoists shall be designed to raise and lower the work at a speed not greater than 11 feet per minute. (2) AH products after immersion in solvents shall be held in the vapor zone of the tank and shall not be withdrawn from the tank until the product reaches the vapor temperature as evidenced by the stopping of vapor condensation on the product (8) Loading racks shaU be of metal or equaHy impervious material (4) The horizontal cross section area of product or rack shaU not be greater than two-thirds of the horizontal cross section area of the (h) Welding and open flame work. No work involving welding, open flames or other sources of ignition shall be done at or about any equipment for open surface tank operations unless such equipment has first been thoroughly cleaned of all flam mable or volatile*solvents and their vapors or is protected by distance or by against accidental ignition or heating from such work. (1) Special precautions for cyanide. (1) Where rinse, add and cyanide tanfcs are so instsHed and used that any of them may be contaminated with cyanide or add, such tanks shaU be provided with local exhaust ventilation. (2) Cyanide tanks shaU not be provided with drains or overflows which will allow the tank contents to mix with liquid drained from other tanks either on the floor or in floor drains unless the cyanide drainage has been properly neutralized. (8) Cyanide salts shaU be stored in a locked enclosure and set above the level of any floor on which add carboys are stored. mi4 is l-si-n CHAPTER X Bi ORHST. f 12.24 12.2.5 Tumbling processes. Tumbling processes creating dangerous air con* tamlnanta shall be provided with means to remove or control such the point of generation. Mxeeptlon: Tbs above does not apply to mills, drams, eagss or bsrrels which are completely enclosed during rotation and which disseminate air contaminants only when being charged or discharged. ICeans shall be provided to oontrol such contaminants. 12*2.6 Abrasive blasting operations, (a) General. Abrasive blasting opera* tiani creating dangerous air contaminants Shall be enclosed as completely as prac ticable and Shall be provided with local exhaust systems to remove the air contam inants. Mmeeption: Outdoor abrasive cleaning operations where the oper ator is furnished with and wears an approved air line respirator. (b) Operation. Approved air respiratory protective equipment of the supplied air type shall be used by persons employed In abrasive blasting rooms at tunnels. (e) Air supply. Air furnished to air line respiratory equipment shell be dean. 12-2.7 Crushing, milling, screening, mixing and conveying. Crushing, milling, screening, TM<*<"g and conveying and related processes creating dangerous air con taminants shall be enclosed and provided with local exhaust ventilation to remove or control the air contaminants at the point of generation. 12*2.8 Welding, brazing, flame cutting and metallizing, (a) General require ments. -Welding, brazing, flame cutting and metallizing operations creating danger ous air contaminants shall be provided with ventilation to control such contaminants. '(b) Glosses of operations. Operations Involving welding, brazing, flame cutting tad metallizing operations an divided into the following classes for the purposes of this Part (rule): (1) Clou I--operations in confined spaces involving toxic metals Including but not limited to antimony, berrylllum, cadmium, lead, mercury, selenium or tellurium, or involving fluorine or any alloy, compound or flux onntaiwiwy any one or combination thereof of other dangerous air contaminants. (2) Close II--operations in confined spaces involving metals, alloys or com pounds other than those listed In Class X. (8) Class III--operations in onconfined spaces involving metals, alloys or compounds listed in Class X. (4) Glass TV--operations In uncanflntd spaces involving metals, alloys at compounds other than those listed In Class X. (e) Protection of operators. (1) Close I requirement*. Every employee re quired to work within a confined space where any Class X operation Is performed shall be furnished an approved air line respirator or supplied air helmet, and the confined space shall be ventilated at a minimum rate of 1,000 aim. per welder within the enclosure. (2) Class II requirements. Every employee required to work within a con fined space where any Class H operation is performed shall be furnished an approved air line respirator or supplied air helmet, or the confined space shall be ventilated at a minimum rate of 1,000 cim. per welder within the enclosure. (8) Class III requirements. Every Class XQ operation shall be provided with local exhaust ventilation. (4) Glass TV requirements. Every Class XV operation at a fixed location as 18&10 XJ3 1-81-71 S 12-2.9 VITUS 12 LABOR put at ft production process ahall be provided with local exhaust ventilation where practicable. AH other Class XV operations shall be provided with dilution venti lation. Mmoeption*: The foliowins Class XV operations are excepted from the above: 1. Spot welding. 2. Operations which are not usual shop psaohoe. A Out-of-door operations. 12-2.9 Exhaust |ases from motor vehicles operatins In enclosed areas. En closed areas in which internal combustion motor vehicles ue operated and release dangerous air contaminants shall be provided with means to remove or ocntrol the fumes, gases or vapors released or disseminated. 12-2.10 Industrial products coaling, (a) Where performed. Coating shall be conducted in a ventilated hood, booth or enclosure complying with this Part (rule) and section 18.20 of Industrial Code Fart (Rule No.) 18. (b) Vehicle*. Vehicles shall not be taken into or out of spray coating spaces undar their own power, unless the exhaust system is operating. (o) Uee of different types of coating materials. Where different types of coating materials are used in the same booth or space, the booth or apace shall be thoroughly cleaned of previous coating deposits before commencing the application of the new nhatan-a (d) Sanding. Banding of surfaces containing lead or lead pigment shall be dene either with sandpaper wetted with water or in an area provided with an exhaust system providing ventilation at a minimum rate of 150 f.pun. in the breathing sons of the worker. (e) Cleaning of heode and boothe. Exhaust fans and the interior of hoods, booths and ducts shall be maintained free of accumulations of coating material. - (f)- Lining of epray boothe. Material for lining of spray booths or hoods, it used, shall cover the inner sides of the booth or hood without overhanging and shall be maintained in contact with the walla of the booth or hood. Loose sections shall be removed or shall be reapplied to the wall surface. (g) Farced drying and baking. (1) Construction. Ovens, cabinets, other en closures and duct work used for forced drying or baking systems ahaii bo con structed of incombustible material with expansion joints provided in the oven framing. Duct work shall be provided with two inches clearance or three-fourths inch of incombustible rigid insulation where the duct work passes through combus tible walls, floors or roofs. The temperature of surfaces in contact with walls, floors or roofs shall not exceed 160 degrees Fahrenheit The floor surface of the oven shall be of Incombustible material and extend at least one foot beyond the oven outline. Interior suraces shall be smooth. (2) Ventilafion. (1) Ovens, cabinets and other enclosures used for such purpose shall be provided with mechanical ventilation to maintain the concen tration of e-mmahu vapors below 25 percent of the lower explosive level at all Him. Ovens shall be exhausted mechanically so that an inward air flow be maintained through all openings to prevent escape of dangerous air contam inants. The fans of such exhaust ventilating and any recirculating systems shall be Interlocked to the heat supply by means of approved air flow switches, so that the heat supply shall be cut off unless the fan maintain, the required air flow. Conveyors shall be interlocked with the oven exhaust and any recircu lating fans so that the conveyors cannot operate unless such fans are operating. (H) When persona am required to enter the drying enclosure, the oancen- miff LB 1-51-71 UHAVTBH 1 BO^RD^pF BTAXPArtDBAi'Jc'JiAlS } 1J.J.10 tratlon of air contaminant* *^1 be maintained below the danger level by ventilation. (8) Xsplotion twite. Ovena located lnalde buildings and In which flammable vapors or combustible gases may be present in amounts exceeding 25 percent of the lower explosive level hn be equipped with explosion relief panels to relieve faitei-nsi explosion pressures. Such vents shall provide an unobstructed aggregate area of one square foot of panel opening to each 15 cubic feet of oven volume, allowance being made for access openings and doors arranged to yield easily to Internal pressure. Relief panels shall. If practicable, be located In the top of the enclosure and be made of material other than glass, which shall yield easily to Internal pressure. On long ovens, relief panels shall be distributed to provide effective explosion relief. Relief panels shall be located and arranged so as not to create a hazard to employees or to other work spaces. Panel edges shah be main* talned free of condensate and other solid material to insure proper operation. (4) Control*. (1) Tan switches shah be interlocked with the fuel valve through a time delay arrangement to assure proper pre-ventilation before the fuel Is Ignited. Where necessary, enclosure doors shah have a limit switch Interlock to prevent the time delay relay from operating unless the enclosure doors are open. (II) The fuel supply line shah be provided with a pressure switch to shut off the fuel supply when the fuel supply pressure Is insufficient. The switch shall not reopen the fuel valve automatically. (III) An excess temperature limit switch shah be provided to cut off the fuel supply when oven temperature exceeds the safe limit. The switch shall not reopen tbs fuel valve automatically. (tv) Combustion safeguards shall be provided to shut off the fuel supply In , the event of pilot light or Ignition failure. (8) Damper*. Air supply or exhaust volume control dampen shall be ad justed property and fixed securely. Dampen shall be designed to prevent full closure. (6) Combination booths. When coating and forced drying are done alter nately in the same booth or enclosure, the following requirements shall be compiled with: (I) During coating operations, the drying apparatus and electrical con nections and wiring thereto shall not be located within the coating enclosure nor In any location where coating residue may be deposited thereon. (II) Coating apparatus, drying apparatus and ventilating system of the coating enclosure shall be equipped with suitable approved Interlocks so ar ranged that coating apparatus cannot be operated while drying apparatus Is inside the coating enclosure and the coating enclosure shall be purged of coating vapors for a period of not less than three minutes before drying apparatus can be energized; the ventilating system shall continue In operation during the drying process and In the event at failure of the ventilating system, the drying apparatus shall shut off automatically. (7) Cleaning. The inside surfaces of the drying enclosure b*n be maintained clean. Cleaning tools shall be of nonferrous material. (h) Lighting. Illumination of hazardous areas through material Is permitted only under the following conditions: of transparent (1) Fixed lighting units shall be used as the source of (2) The panel shall affectively isolate the which the lighting unit la located. area from the area in 18&17 LB 1-81-71 112-2.10 TITLE 12 LABOR (8) The transparent panel conform to subdivision (a) of aection 18.20 of Industrial Code Fart (Rule No.) 18. (4) The installation shall be such that the normal accumulation of hazardous residue on the exposed surface of the panel will not be raised to a dangerous temperature by heat radiation or conduction from the source of Illumination. (1) Electrostatic apparatus. (1) IaetdOation and use. The installation and use of electrostatic apparatus shall comply with other applicable provisions of this Fart (rule) and with the following requirements: (2) Approval required. Only approved electrostatic apparatus shall be used. (8) Conductive coatings. This method shall not be used for spraying conduc tive coatings. (4) Band operations. Manually operated spray guns or atomizers shall not be used in an electrostatic field unless they are approved. (5) Location. Electrostatic apparatus and devices used in connection with paint spraying, dipping or other coating operations shall have transformers and power packs located outside spray booths or enclosures and areas subject to paint deposit. (6) Supports. Electrodes and electrostatic atomizing heads shall be rigidly supported and permanently Installed and shall be effectively Insulated from ground. (7) Clearance. Space of at least twice the sparking distance shall be main tained between articles being finished and electrodes, electrostatic atomizing of conductors* (8) Articles on conveyors. Articles on conveyors shall be so arranged and supported as to maintain the required clearances. (9) Automatic controls. Electrostatic apparatus shall be equipped with auto matic controls arranged to make the entire equipment dead if the ventilation of the spraying or drying area falls below a velocity of 100 feet per minute, or If an article on the conveyor projects Into the required clearance, or if the conveyor stops.. (10) Guarding and isolation of process. The electrical field and all parts of the equipment carrying high potential shall be located, guarded and fenced off to provide safe Isolation of the process. Guards and fences be of mdiicHng material and shall be grounded. (11) Signs. A suitable sign stating the sparking distance shall be posted conspicuously near the assembly. Signs designating the process zone as dangerous by reason of fire and accident hazard shall be posted. (12) Insulators. Insulators shall be acceptable to the potential used.and shall be maintained clean dry. for the 18648 LB 1-81-71 CHAFThU X - nra rta*si*' --"*iii- jLmiEAjja 12-3.1 SUBPART 12-3 EVIDENCE OF DANGEROUS A1B CONTAMINANTS 8M. 1841 Gsnaral 12.3,1 General. The existence of air contaminants consisting of or deriving from the substances named in the following tables in relative quantities greater than those set forth as to each substance hsTi constitute prime fade evidence that such contaminants are dangerous air except when they exist only monies- tarlly and infrequently. Prim* fade evidence as to whether such contaminants in momentary infrequent occurrences, or other air -TM*aT"iwentj not named in the tables or lesser concentrations than those set forth in the following tables constitute dangerous air contaminants by reason of their existence in quantities tending to injure the health at employees shall include an opinion to that effect by a physician representing the industrial commissioner. Note; Petitions for variations porstsast to section SO of the Labor Law from administrative orders issued on the basis of prims fade evidence of dangerous air contaminants will be dedded by the board after review of reports of air teats and field investigations submitted to the board by the com* mlssloner and a hearing which the petitioner will attend. The petitioner will be given opportunity to submit testi mony, data and test results at the hearing to support his variation request. TABLE I--Threshold Limit Values CTJ**T.) . fubttoMcm (in alphabetical order} PP**'<* Abets .............................................................................. . Acetaldehyde ............................ ' Acetic add ............................................................................ Acstio anhydride.................................................................... Acetone ................ Acetonitrile ....................................................................... . Acetylene dichloride, see U Slcloroethylene Acetylene tetrabromide .......................................................... -- 900 10 S 1,000 40 1 Acrolein ................................................................................. Af*W>l>fnW88lrin 01 Me Acrylonitrile-ekln ........................ Aldrin-ekin ............................................................................. 90 -- Allyl alcohol-akin................................................................... Allyl chloride.......................................................................... 8 1 O Allyl glyddyl ether (AGE) ................................................... Allyl propyl disulfide ............................................................. 10 8 2-Aminoethanol, see Ethanolmmine 3-Amlnopyridine ..................................................................... 06 Ammonia ................................................................................ 80 Ammonium sulfamato (Animate) ..................................... -- n-Amyl acetate............................................. 100 sec-Amyl acetate.................................................................... ug Aniilne-skin ............................................................................ g Anisidins (o,p-isomers)-akin ............................................... --. Antimony A compounds (as 8b).........1................................ -- ANTU (alpha naphthyl thiourea)............ -- Arsenio A compounds (as As)........................... -- XniM ..................................................................................... 008 V MO M SO 9,400 TO II OJ8 Out 48 0J5 8 8 48 38 a M jg tOB gp jg. gj qjj 08 08 w Parts of vapor or gas per million parts of air by volume at 98 degrees Centigrade and 780 mm. Hg praesure. tu Approximate milligrams of particulate per cubic mater of air. 1MB addition. O Celling limit which shall net he exceeded even momentarily or infrequently. 13019 LB 1-81-71 S 12-3.1 TITLE 12 LABOR TABLE I--Threshold Limit Valuta (coat'd.) Bubttanea A*lnpho*-m*thyl**kin ....... ,................................. tpmf-- Barium (soluble compound*) ............................... O Banxans (b*nxol)-ekia............. .......... ................. Banxtdias-akia ........................................................ P-Bansoqulaona, m Quinone Banaoyl peroxide ............ .................................... . Bansyl chloride ....................... ............................ Beryllium ................................. ............... . Blphanyl, s*a Diphenyl Boron oxlda............ .................. . Boron tribromlda............... .................................. o Boroa triflucrid* ....... ............................................ Bromiaa ....................... .......... .................. Broads* pantaftnorid*..................... . Bromoform-akla ................................. . Botadlao CL 9-butadlana) ................................... Butanathlol, s* Butyl mercaptan S-Butanoa* ........................................................... 3-Butoxy ethanol (Butyl C*&oaolv*)-akta.......... Butyl aettato (n-butyl aeatata) ........................... , **c-Butyl aeatata .................................... ............. tart-Butyl aeatata ............ ................................... Butyl alcohol ..................................................... sae-Butyl alcohol................................................... . tart-Butyl alcohol................................................... c Butylamina-akin ................................................ . o tart-Butyl chromata (aa CrQO-akin.................... n-Butyl glycldyl athar (BOB) .............................. , Butyl marcaptaa .................................... .............. p-tert-Butyttoluan* .................. ............................ . Cadmium. (Natal duat aad aolnblt aalta)............. Cadmium oxide fum*............ ............... Calcium arsenate......................... ......................... Calcium oxlda........................................................ Cu&^bof a*, a# a a aaa* #* a* a* *# ***** ***. Carbaryl (Bavin**) ................................................. Carboa black ................................................. Carbon dioxide .......... ........................................... Carbon diaulflda-akin ....................... ..................... Carbon moaoxid* ................................................... Carboa tatrachlorlfla-iVin ..................................... Chlordaaa akin ...................................... ................ Chloriaatad camphana aMn .................................. Chlorlaatad diphenyl oxlda.................................... Chlorine ........................................................... . Chlorla* dloxlda ..................................................... c Chlorla* trlfluorlda ................................................. a Chloroacataldahyd* ................................................. alpba-Chloroacatophaaoa* (phauacylchlorlda) ... Chlorobtnstn* (moaoehlorobtaaaa*) ................... o-Chlorobanzylldana maloaoaltxfi* (OCBK) ....... CUoxobromomathaaa ........ 2-Chloro-l, 8 butadiene, aa* Chloropraa* Chlorodiphaayl (49% Chlorla*)-akin .................... Chlorodiphanyl (84% Cblorla*)-akla .......... . 1, Chloro, 3, 8, apoxypropan*. aa* Bplchlorfaydrla 2, Chloroathaiiol. aa* Sthylta* chlorehydrla Chloro*thylaaa, aa* Vinyl chlorlda M -- _ 1 -- _ 1 1 dl 01 OB 1000 aoo BO ISO 900 JOB 900 380 100 B -- BO 10 30 -- -- -- --S -- -- 5,000 00 10 -- -- _ 1 01 01 1 0.06 7B 0.06 900 a. -- s*p/3P~ OS 04 00 X 8 0008 38 * _OT B 9400 BN M0 730 IN IN 900 460 900 38 OX 910 86 to O* 01 1 _ 8 84 9,000 m m 04 08 04 08 04 8 04 m 04 3,080 1 04 w Parts of vapor or gaa par million parts of contaminated air by volume at SB degrees Centigrade aad 760 mm. Bg pressure, cv Approximate milligram* of partlcolat* par cubic matar of air. C Ceiling limit which shall act b* exceeded area momaatarily or lafrsquaatly. i960 addition. .. * Raglstarod trade name A No exposure or oontaet permitted by any rout* (respiratory, oral or skin). 18020 IS 1-91-71 CHAPTER X S 12-3.1 TARTili I--Threshold Limit Value# <oonfd.) Jhtbetaace TP*** O Chloroform (trichloromethane) ........................................... 1-Chloro-l-nltropropane ........................................................ Chloroplcrln .......................................................................... Chloroprene Cb-chloro-X 3*butadleua)*akin.................... ... Chromic add and chromates (aa CrOs) ............................ BO 30 ax 35 -- Chromium, soL chromic, chromoua aalta (u Cr) ......... lbUl and inaoluble aalta ................................................ -- Coal tar pitch rolatUaa (haBscaa aotubls fraction, anthra- oene, BaP, phananthraaa, acridine, chrysene, pyrsne) Cobalt, matal turn* and duat .................................... ......... -- Copper fume ................................................................. ... -- Puata and mlata .................................................. .......... Gotten duat (raw)....................................... ......................... _ Crag** herbicide............ ................................................... . Cresol (all iemer)-ekin....... ........................................ . Grotonaldehyde ................................................ ...................... Cumana-aldn ...................................................... Cyanide (aa GM)^ktn.................................................. . Oyanofen ............................................................... ............... Cyclohexane ............... .......................................................... Cydohexanol ....................................... ............................. . Cyclohexanone ....................................................................... Cyclohexane ............................... ............... .......................... Cydopentadlene .................................... ........................... ... 5 3 TO -- 30 300 TO TO TOO 15 % .................................................................................. PPT-aldn ................................................................................ Bzmmda .............................................................................. Pecaborane-aWn ................................................................... __ --- -- 0.06 SemetonM4kla ....................................................................... Plaeetone alcohol <*-methyl*3*pentanone) .................. . SO X 2 Plamlnoethane, eea Bthyllenedlamina Ptasntnethane ........................................................................ Ptborane............... .................................................................. Oil ox o 1, 2-Pibromoethane (ethylene dibnomldel-akin ................... Plbutyl phoaphata........................................................ ......... XHbutylphthalate .................................................................... TB 1 -- o o^Dlchiorphancane ........................................................... p-Dlchlorobenaene .......... ...................................................... 50 15 Pichlorodifluorometbane....................................................... X000 1, S-Dlehloro-5, dimethyl hydantoln.................................... _ X 1'Dichloroethane............................................................... 300 1, S-Pichloroethane .................... ........................................... X S-Plchloroethylene .................................................... . 50 300 o Pichloroethly ether-akin ............................................... . 15 Pichloromethane, aee Kethylenechlorlde PIchloromonolluoromethane ......................................... . xooo o L 1-PIchioro-1-nltroethane............... ............................... . 10 X 3-Plchloropropane, aee Propylenedlohlorlde Sichlorutetrafluoroethane .............................................. Dleldrin-eldn............................................................................ Piethylamine .......................................................................... Diethylamino ethanoV-ekla .................................................. XOOO __ a 10 c Piethylene Mamina-akin ....... .............................................. 10 Plethylether, aee Ethyl ether eeeeeeeeee* 100 mg/X* <*> MO 100 0.7 $0 OJ. 05 3 OS Ol Ol 1 1 15 a 0 MB 1 -- X060 TOO 300 X005 300 10 X 1 OS 0.1 MO 04 OX 1*0 6 5 300 450 4,060 0.3 400 300 790 TO 0300 TO 7.000 oa a TO -- 360 < Pasta of vapor or saa par million parts of oontamlnated air by volume at 35 decrees Centlyrade and 760 mm. Hf pressure. n Approximate mllllcnuns of particulate per cubic metar of air. O Canine limit which shall not be exceeded even momentarily or infrequently. 1*60 addition. Bsglstarad trade name. 180JX LB 1-81-71 i 12*3.1 TITLE 12 LABOR TABLE Z--Threehold Unit Valuee (cont'd.) gabetanoe ffMH'**- C Diglycldyl ether (X>QE) .............................................. . Dihydroxybenxene, m Hydroqulnone 64 Dlleobutyl ketone............................................................... BO BUeopropylamine^ldn .............................................. Diphenyl tain*..................................................................... 9 -- Dlmethoxymethane, m Methylal Dimethyl acetamide-akin...................................... 10 Dimethylamine ............................................. Dimethylaminobenaene, eee Xylidene Dimethylanlline (N-dimethylaniline)-ekln ......................... 9 Dlmethylbcnzene, eee Xylene Dimethyl, 1, 2-dlbromo-X 8-dlchloroethyl, (Dibrom) ...... -- Dlmethylformamlde-ekla ........................................................... 30 3, 6 Dimethylheptanone, eee Dllsohatyl keteae X 1-Dimethyihydraaine-ekin......................... . 04 Dimethytphthaiate ...................................................................... -- DimethyUulfate-ekla ................................................. .......... 1 ZMaltrobcaxene (ell i*omer*)-*kin....................................... -- Dinltro-o-crol-ikin................. -- Dinltrotoluene-ekln .................................. -- Dioxane (Diethylene dloxide)-ak!n...................................... 300 Diphenyl .................................................................................. 04 Diphenyl Amine ................................................... Dipheayhaethaae dilaoeyanate (eee Methylene Mephenyl laocyanate) (EDI) ........................................................... Dipropylene glycol methyl ether-akin ................. 300 Dl-eee, octyl phthalate (Di-3-ethylhexylphthalate) ............... -- Endrin-ekin ................................... Splchlorhydrin-ekla .............................................................. EPN-ekia ................................................................................. X 2-Epoxypropane, eee Propyleneoxlde X 8-Epoxy-l-propanol, eee Olyoidol -- 5 -- Ethanethlol, eee Xthybaercaptaa Sthnnolamine................................................... , 3 Sthoxyethanol-ekln........................................... BOO 2 Sthoxyethylacetate (Celloeolve acetate)-elfin................. 100 Ethyl acetate .......................................................................... 400 Ethyl acrylate-akin........................ 90 Ethyl alcohol (ethanol).......................................................... X000 Ethylamina ........ 30 Ethyl aec-amyl ketone (5-methyl-8*heptanone) ................. 95 Ethyl beneene ........................................................................ 300 Ethyl bromide ........................................................................ 300 Ethyl butyl ketone (S-Haptaaane) ...................................... 00 Ethyl chloride ................................... X0000 Ethyl ether.............. 400 Ethyl formate ....................................... 100 Ethyl meroaptan ............................................... 30 Ethyl ailicate .......................................... 300 Ethylene eblorOhydrin-ekin ........................................ 5 Ethylenedlamine ..................................................................... 30 Ethylene d(bromide, eee X 3-Dibromoethana Ethylene dichloride, eee 1, 3-Dlchloroetheae C Ethylene glyool dinltrate and/or Mitrogyleerln-ekin......... Ethylene flyeol monomethyl ether acetate, eee Methyl ceHoaolre acetate Ethylene hntne-eklTi ..................................................... ......... 04(d) 04 mff/Jn n> ** 4 MO BO ID Of 3030 36 9 BO X I 9 3 03 1.5 BOO X --30 000 9 Oil 19 04 3 too 640 1,400. ioo X000 ]g iao 4X6 MO bso X000 1,900 boo 35 tso it 2b 1 X (i Parte of Taper or gaa per million parte of contaminated air by volume at 35 degreae Centigrade and 760 mm. Hf preecure. *> Approximate milligrama of particulate per cubic meter of air. I960 addition. O Celling limit which ahall not be exceeded even momentarily or infrequently. (d) An atmoepherlo concentration of not more than 0.02 ppm, or peraonal protection may be neceecary to avoid headache. 13643 LB 1-31-71 | i CHAPTER I BO. S 134.1 TABLE I--Threshold Limit Values (oontfd.) / Ethylene odd* \ 1V*P> mg/K*ru N-EthyhnorphollneHlkia .......................................... (o riwIiLwttwittidfta ( , f r__T_________ .......... Oylool monoethyl ether, see S-Bthoxyethand Onthlon**, see Aaiaphosmethyl H m 25 a u Of 8,900 I 4 ft) an x 319 TyAydoMAWtTfphfhftWo W*t T.,______________ _ t.7TawawAwa _____ __________ T__ ________ ____ Hydraslne-akin ............................ .......................... . fTyrirngM fwvtmMft . ___ __ ___________ ...a.....*, o Hydrogen cyanide-skin ............................................ Hydrogen fluoride ...................... ' Hydrogen peroxide, 90ft............ Hydrogen telenlde ..................... Hydrogen sulfide ........................ ajrdnqnlsoiM ........................... Indium ui compounds (as In) o XOdln** ........................................... . Iron oild* tan* ......................... Iron udt*, soluble (a* T*)....... Xsoamyl acetate .......................... Xsoamyl alcohol .........................., Xsobotly acetate ......................... Isobutyl alcohol .........................., Xsophoxon* ................................... . Isopropyl acatat* ........................ Isopropyl aloohol ........................ , ISopropylamln* ............................, Xsopropylether ............................ Isopropyl glyddyl thr CCOB) ITAtww^ *#***i*#*.*.***i.**i Lead-............................................. Load axianata.............................. Li&di&9*flk]& *****#*. lithium hydrldt ......................... L.P.Q. (Liquified petroleum gas) Magnesium oxlda tana.............. Xalathlon-sldn ........................... lfalalo anhydride ............... 9 1 0.00 30 OH -- -- 100 100 190 100 v 300 400 9 900 90 09 -- -- _ _ *000 _ 0J9 09 Old *000 30 ou *900 <no 410 900 u 10 T 11 s 1.4 0.3 10 a 01 1 10 1 835 too 700 900 140 900 900 IS *100 340 09 OS 0.19 09 0039 *900 39 19 1 w parts of vapor or gas par million ports of contaminated air by volume at 20 degress Centigrade and 760 ram. Hg praetor*, w Approximate milligrams of particulate per cubic raster of air. O Calling limit which shall not b* axetadad even momentarily or Infrequently. A No exposure or contact permitted by any rout* (respiratory, oral or akin). loop addition. * Registered trade naiaa 18038 IS 1-81-71 s 12*3.1 SETTLE 23 LABOR Bttbttaaoa TABLE X--Threshold limit Values (ooatfd.) **rmlu O Vinium .............................. ........................................... ltamt^-iUa ................................ ........................................ Vercury (organic compounda)-akin.................................... ~ " -- UultTlaU* ........................ Vethanethlol, ih Vathyl mercaptan a a#**"1 2-Vethoxyethanoi im Vathyl oelloeolve Vathyl iMtati .............. *00 lbt&Tl acetylene (propyne) ................................................. 1.000 Vathyl acetylane-propadleao mixture (VAPP) ................. 1400 Vathyl leqrlttMkh ............................................................. Vathylal (dimethoxymethane) .................................. 3.000 Vathyl alcohol (methanol) ................................................... SO Vethylamlne ................................ 10 Vathyl amyl alcohol, aoa Vathyl laohatyl earbiaol Vathyl (a>amyl) katoaa (S-Heptanona).............................. 100 O Vathyl bnaUailda ......................................... Vathyl butyl katoaa, aaa 3-Haranona Vathyl citoiolTaiUa............................... Vathyl eelloaohra aoatata abfn ............................................. *0 * * O Vathyl chloride..................................................... Vathyl chloroform........................................ lfathylcyclohcxano ................................................................ Vathylcyclohaxanol ........ o-Vothylcyclohaxanonc-aMn ................................................ Vathyl athyl katoaa (VBXO, aaa S-Bataaoaa Vathyl formate ........................... Vathyl lodlda-akla ................................................................ Vathyl laohatyl carWnoUkia.............................................. Vathyl laohatyl katoaa, aaa Haatcaa Vathyl laocyaaata-akla ................................. . 100 SO BOO 100 100 100 8 *6 Ml O Vathyl mercaptan....................................................... Vathyl methacrylate ........... Vathyl propyl katoaa, aaa B-Pantanoae 10 300 O *Vthyl affleata......................................................................... 8 O alpha-Vathyl atyraoa........................................ 100 O Vathylaaa hlaphaayl laocyaaata (VBX) ............................... 0.0* Vathylana chloride (dlchloromethene) ................................ 600 VOlyhdanum (aolubla compounda) ..................... -- (laaolahla compounda) ..................................................... -- Voaomathyl aivfllTie-aWn ...................... 2 O Voaomathyl hjilrailna akin .................................................. VriTIiTirillTia akin ..................................................................... 04 *0 Naphtha (ooal tar) ................................................................ 100 Naphthalaaa ......... 10 beta-Naphthylamlne .................................................... -- Nlckal carbonyl ..................................................................... 0.001 Nickel, matal and eoluble oompounda ................................ -- Nlootlna-akln ................................................ ......................... -- Nltrlo add............................................................................... S Nltrle oxide ............................................. S p-Nltroanfline-eldn ................ 1 Tfflmhmiana aWn .................................................. 1 p-Nltrochloro-bensene-aldn ..................................... -- Nttxoathaaa .............................................................................. 100 O Nitrogen dioxide................................................................... B Nitrogen Trlfluorlde ............................................................... 30 mg/tt* * 8 W 0.01 100 SI <10 2.060 1.600 *0 1,100 *00 1* MB *> 1*0 XU 1400 2,000 470 ' 400 *00 V 100 0.06 *0 410 -- 400 04 2.T4D B 38 * 048 SO 400 00 A 0.007 1 04 B *0 C B 1 810 * V w Parta of vapor or gma par million parta of eontamlnatad air by TOlnma at 36 degraaa Cantlgrada and 760 am. Hg preaeure. Approximate mOligrama of partleulata par cubic matar of air. A No axpoaura or contact parmlttad by any route (reaplratory, oral or akin). O Calling limit which shall not be exceeded even momentarily or Infrequently. I960 addition. 22644 US 2-22-71 CHAPTER X BOj^RDJ3F fiTAMPARDSAWD~3KEPALSj. 12*3.1 TABLE I--Thraehold Limit Valuaa (mat'd.) JSubitanc* yym/M mg/in <m C Nitroglycerln-akln .................................................................. OS Nltromethane .......................................................................... 100 1-Nitropropane ...................................................................... as 3-Nitxopropane........................................................................ as N-Nitroaodlmethyl-amine (Dlmathyl-nltroaoainlne)-ahin.. Nltrotoluene-aldn ................................................................... -- s Nltrotrlchloromathane, am Chloropicrin Octachloronaphtbalene*akin .................................................. OotftBl 600 OU alit (mineral) .................. .............................................. Oamioa tetxoxtde .................................... ............................ _ Oalls add ............................................................................ Oxygen difluoride ........................................................... . AOS Osoaa ..................................................................................... PuifuMda ....................................................................... ax _ Parathlcn-ekin ...................................................................... Futitenu ......................... ......................................... Fentachloronaphthalene*akln ............ ................................. _ (LOOS __ Fentaehlaropbenol*akin............ ............................................. _ Pentane ................................... ................................................ 1.000 S-Pentanone .................................................................... . aoo Ferchloroethylene............ ..................................................... 100 Percbloromathyl mercaptan.................................................. 01 Perebloryl flsorlda ............................ .................................. S Petroleum DlstHlataa (naphtha) .......................................... BOO Phenol-akin .............................................. .............................. s p-Phenylene diamine-akin ................................... ............... -- Pha&yl athar (vapor) ........................ ................................. . 1 Pha&yl athar*Blphanyl mixture (vapor) ............................ 1 Fhanylathylaaa, aaa Styraao Phaayl glyddyl athar (FOE)................................................ 30 Fbenylhydraxine-ekln............................................................. s Phoadrln (Kevinphoa**)-akln................................................ -- Fhoagane (carbonyl chloride) .............................................. 03 Fhoaphiaa ............................................................................... OS Phoaphorle add ..................................................................... _ Phoaphorua (yellow) ............ ................................................ -- Phoaphorua pantachlorlde .................... ................................ -- Phoaphorua paataaulflda ....................................................... -- Phoaphorua triehlorlda ......................................................... OS Fhthalic anhydrlda ...................................... ......................... s Picric add-akin....................................................................... -- Plval** (2-Pivalyl-l, I-lndandione) ...................................... -- Platinum (aolubla aalta) ...................................................... -- Folytetrafluoroetbylene daeoapoaltloa produeta............... -- Propane .......................................................... ....................... 1.000 bata-Proplolaetoaa ...................................... ......................... -- Fropargyl alcohol-akin .......................................................... 3 a.Propyl acatata..................................................................... aoo Propyl alcohol ................................................................ . n-Propyl nltrata ..................................................................... aoo as Fropylaaa dlehlorida ............................................................. Fropylaaa lmlna-aUn ............. ............................................... Propylana ozlda ..................................................................... Propyne, aaa Uathylacatylana 75 S 100 Pyxethrua ............... .............................. Pyridlna ................................................................................... Qdnone .................................................................................... s 03 a aoo 0 0 A 10 03 o*oo OOOB 1 OX OS OS 03 003 08 OS O60 TOO 870 OS 1U 1,000 39 01 T T 00 S3 03 04 04 3 Ol 3 X s 13 03 03 0003 A? MOO 4) 84Q 800 310 aso s Stt B it 04 Farta of vapor or gas par million parta of contaminated air by voluma at *5 degreee Centigrade and 780 mm. Hg praaaura. Approximate mllllgrama of particulate par cubic matar of air. No expoaura or contact permitted by any route (reaplratory, oral or akin). No expoeure or contoct permitted by any route (reaplratory, oral or akin). No TLV recommended pending determination of toxicity of produeta, but air concen tration! ahould ba minimal. Calling limit which ahall not ba exceeded even momentarily or infrequently. U8B addition. Begiatered trade nerne, tee oa t.h 1-41*71 * o e| | 124.1 TITLE 13 LABOR TABU! X--Threshold Limit Veins* (ooafd.) Substance RDX-alda ........................................................................... Rhodium, Ketel fume end dusts.................................. Soluble suits ................................................................ Bond ................................................................................ -- -- --* -- U AX aooi as Rotsaont (commercial) ......................... SsltzUum compounds (us Bs)............... --S -- a* Ssla&ium hexafluoride ........................................................... SUrcr, Metal sad soiubls eompounds ................................. Sodium fluorosestuts (1000)-skin....................... AOS -- -- 0o4at ate Sodium hydroxide .......... ............... .................. .................. 8tibiae ..................................................................................... Stoddard eolrent ........................... -- OX BOO s AS A*0Q Strychaiae ..................................... .................. .................. -- O Styrene monomer (phenylethyisa*) .................................... 100 Alfl ISO Sulfur dioxide ............................................. Sulfur hexafluoride .................... I 1,000 10 A00O Sulfurio add ................... Sulfur monochloride.................... ......................................... Sulfur pentufluoride ............... ......................................... . Sulfnxyl fluoride......................................................... . Systox, see Semetoa** -- 1 0.006 S 1 aos n t, 4, 6, T.................................... Tantalum .................................... TBDP4U& ............................ ID I A0 Teflon** deoompositioa produets A) Tellurium ..................................... Tellurium hexafluoride ...................................................... 0.00 TEPP-eldn ............................................ .................... . -- O Tetpheayls .......................................... ............................... X L L L S-Tetraehloro-3, 2-d!fluoroethaae........ ................. 800 1, 1, A 3-Tetraehloro-l, 3-dlfluoroethaae ................ 800 L L -3, 3-Tetruchloroethaae-alda.................................. . 8 Tetrgehloroethyleae, see Perchloroethyleas 05 AO AOS t 41 41 Tetrachloromethaae, see Carbon tetruehlorldu Tetreehloroaapbthalene-akla .......................... Tetraethyl lead (us Pb)*skia................................................ -- -- 0 AOfIB Tetruhydrofurua .................................................... Tetrmmethyl lead (TML) (us Pb)-*kia................................ Tetrumethyl sucdnonltrile-ekin........................................... Tetraaltromethaa* ......................................................... Tetryl (3, 4, 8-trinitrophenylmethylnitremine)-ekin 000 -- OS X ON A01S 0' S IS Thallium (soluble oompounda)-akla ......................... Thirem ................................... .................................... Tin (Inorganic compounds, except BnH> and SnOi) Tin (organic compounds) ........... -- Titanium dioxide ................................................................... -- Toluene (toluol) ..................................................................... 000 AS s s AS IS 780 C Toluene-3, 4-diisoeyeaute ...................................................... o-Toluidlae-slda ....................................... 0.00 S A14 Toxaphene, see Chlorinated camphene Tributyl phosphate ....................................................... X, 1,1-Trichloroethane, see Methyl chloroform --S L X 3-Trichloroethane-skia......................................... Trichloroethylene....... ........................................................... Trichloromsthane, see Chloroform 10 300 4S 8 Trlchloronuphthalene-skin ........................................................ -- S tt> Parts of vapor or gas per million parts of contaminated air by volume at S3 degrees Centigrade sad 760 mm. Hg pressure. ** Approximate minigrama of particulate per cubic meter of sir. A1 No exposure or contact 'permitted by any routs (respiratory, oral or akin). A* No TLV recommended pending determination of toxicity of products, but sir concen tration! should be minimal. C Celling limit which shall not be exceeded even momentarily or infrequently. 1360 addition. ** Registered trade name,......... .. ....... ISAM LB 1-S1-71 CHAPTER Z BO-ArD JX& stoANDARDSJhKlTAfcFSAXJ*----- ^ | 13,31 TABLE I--Threshold Unit Valuee (eont'd.) Substance PP**,tJ L 2, l*Trichloropropane ........................................................ L 1, 2*Trichloro 1, 2, 2-trifluoroethane................................ Triethylamine ..................................... ................................. Trifluoromonobromomethan* ................................................ ' 2, 4, 4.Trinltrophenol, at* Picric acid 3, i, 6-Trinitrophenylmethylnltramlne, see Tetryl Trinitrotoluene-skin .......................................... Triorthocresyl phosphate ........... Triphenjl phosphate .................................................. Tungsten and compounds, as W solubls ............................ Insoluble .......................................................... Turpentine ............................................................................. Uranium (natural), soluble and insoluble compounds, (as U) ............................................... 60 1,000 28 1,000 -- -- -- -- -- 300 -- C Vanadium (VsOi dust) ........... (VsOa fume) .......................................................... Vinyl bensene, see Styrene -- -- C Vinyl chloride .......................................................... 600 Vlnylcyaaids, see Acrylonitrile Vinyl toluene ....... .'................................................................ 300 Warfarin ................................................................................. -- Xylene (xylol) ....................................................................... 100 Xylidine-akln .......................................................................... 6 Yttrium ..................................... -- Zino chloride fume................................................................ -- Zinc oxide fume ..................................................................... -- Zirconium compounds (as Zr)................... -- mg/M* * MO 7,600 300 MflO U Oil 2 II S W OJ US 01 UOQ 460 03 416 26 1 1 S 2 Substance r" TABLE II--Mineral Dusts JHWon Particles Per OnMo Poof Asbestos'................................... Dust (nuisance, no free sUloa) ...................................... Graphite (natural) ................ 3Qca (below 144 free silica)................................................ Portland cement................................................................ SUloa-- Glass X** ........................................................................... Class IX** ......................................................................... Class XXX** ....................................................................... Class XV** ....................................................................... Slate (below 144 free silica)....................... ....................... Soapstone (below 144 free silica)............... . Tale (below 344 flee silica) ................................................ Tremolite............................................................................... Total dust (below 144 free sUica)..................................................... S 60 31 20 20 20 30 6 BO 20 20 B BO 20 *> Parts of raper or gas per million parts of contaminated air by volume at 26 degrees Centigrade and 760 mm. Eg pressure. ( Approximate milligrams of particulate par cubic meter of air. I960 addition. C Ceiling limit which shall not be exceeded even momentarily or infrequently. * Using the light field low-power method of counting as described in the U.8. Public Stealth Report 41 No. 12, March 12,1912, pp. 668-672 or its equivalent and a standard type implnger or other equivalent instrument for taking atmospherlo dust ssmples. Class I rock. Any rock formation uniformly, containing up to and ineluding 844. by weight, of free silicon dioxide. Class XX rock. Any rock formation uniformly containing mors *" 644, up to * in* eluding 1944, by weight, of free silicon dioxide. Class XXX rock. Any rock formation uniformly gww^iwiwg mors eluding 4044, by weight, of free sllioon dioxide. 1044, up to and In* Class XV rock. Any rock formation containing more than 4044, by weight, of free sUlooa U&27 18 1-S1-71